Electronic spectra of the C[sub 2n+1]H (n=2–4) radicals in the gas phase

Ding, H.; Pino, T.; Güthe, F.; Maier, J. P.
November 2002
Journal of Chemical Physics;11/8/2002, Vol. 117 Issue 18, p8362
Academic Journal
The visible electronic spectra of the linear l-C[SUB2n+1] H (n=2-4) radicals have been measured in the gas phase. These have been obtained by means of a mass-selective resonant two-color two-photon ionization technique coupled to a supersonic plasma source. The observed spectra are assigned to the A [SUP2]Δ←X[SUP2]Π, B [SUP2]Σ[SUP-]←X[SUP2]Π, and C [SUP2]Σ[SUP+]←X [SUP2]Π electronic transitions arising from σ→π electron promotion. The assignments are based on ab initio calculations, wavelength dependence of the 0[SUP0,SUB0] transition on size, and isotopic substitution. The lifetime broadening of the bands and effects due to vibronic coupling are associated with the carbon skeleton bending modes. The detection of these carbon chains in the diffuse interstellar medium appears to be more favorable by radio astronomy rather than by electronic spectroscopy.


Related Articles

  • Jet spectroscopy, structure, anomalous fluorescence, and molecular quantum beats of silylidene... Harper, Warren W.; Waddell, Kevin W. // Journal of Chemical Physics;12/1/1997, Vol. 107 Issue 21, p8829 

    Studies the jet-cooled spectrum of silylidene, a simple form of unsaturated silylene. Characteristics of band consisting the electronic transition; Excited state decay dynamics; Rotational levels specific intensity anomalies; Beat patterns due to coupling with high vibrational levels of the...

  • Synteza, budowa i wÅ‚aÅ›ciwoÅ›ci chemiczne nienasyconych oligo(alkilenoestro-etero)dioli. Kucińska-Lipka, Justyna; Janik, Helena; Balas, Adolf // Polimery;2009, Vol. 54 Issue 7/8, p530 

    The series of polycondensation reactions of unsaturated oligo(alkylene-ester-ether)diols (OAEE) with acidic comonomers [adipic acid (KA), maleic anhydride (BM), phthalic anhydride (BF)] and glycol comonomers {diethylene glycol (DG), ethylene glycol (EG), 1,3-propylene glycol (PG),...

  • Synthesis of pyrazoline derivatives from the 1,3-dipolar cycloadditions using α,β-unsaturated cyclohexanone derivatives. Ziani, Nouara; Lamara, Kaddour; Sid, Assia; Willem, Quentin; Dassonneville, Benjamin; Demonceau, Albert // European Journal of Chemistry;Jun2013, Vol. 4 Issue 2, p176 

    A series of 2-pyrazolines (3a-d) were obtained by reaction 1,3-dipolar cycloadditions of α,β- unsaturated cyclohexanone derivatives (2a-c) with hydrazine hydrate and 4-nitrophenylhydrazine in the presence of acetic acid and ethanol as solvents. The structures of the synthesized compounds...

  • Apolar Annonaceous Acetogenins from the Fruit Pulp of Annona muricata. Melot, Alice; Fall, Djibril; Gleye, Christophe; Champy, Pierre // Molecules;Nov2009, Vol. 14 Issue 11, p4387 

    A methylene chloride extract of the pulp of Annona muricata L. was fractionated in search for scarcely functionalized Annonaceous acetogenins (type E). Previously known C-35 and C-37 mono-epoxy unsaturated compounds, epomuricenins-A and -B (1+2) and epomusenins-A and -B (3+4), were obtained. Two...

  • Meerwein reaction of benzothiazole-2-diazonium tetrafluoroborate. Naidan, V.; Naidan, G. // Russian Journal of General Chemistry;Nov2006, Vol. 76 Issue 11, p1844 

    A letter to the editor on the Meerwein reaction of unsaturated compounds to form tetrafluoroborates is presented.

  • Preface to the Special Issue dedicated to Chemical Research at Western. Baines, Kim M.; Huang, Yining // Canadian Journal of Chemistry;Jan2015, Vol. 93 Issue 1, piii 

    An introduction is presented in which the editor discusses various articles within the issue on topics including research in materials science, how plants interact with environment, and how density functional theory can help understand the unsaturated main group compounds' mechanistic chemistry.

  • Synthesis of kairomones and their analogs from 2-acylcyclohexane-1,3-diones with an unsaturated acyl side chain. Lakhvich, F. A.; Petrusevich, I. I.; Ogeiko, N. G.; Sergeeva, A. N. // Russian Journal of Organic Chemistry;Oct2008, Vol. 44 Issue 10, p1444 

    Natural 2-[(9 Z)-1-oxooctadec-9-en-1-yl]-, 2-[(9 Z,12 Z)-1-oxooctadeca-9,12-dien-1-yl]-, and 2-[(9 Z,12 Z,15 Z)-1-oxooctadeca-9,12,15-trien-1-yl]cyclohexane-1,3-diones (components of flour moth Ephestia kuehniella kairomones) and some their analogs were synthesized from cyclohexane-1,3-diones...

  • Hydrogenation of unsaturated compounds in the presence of palladium-containing modified carbon nanofibers. Osipov, N.; Klyuev, M. // Russian Journal of General Chemistry;May2013, Vol. 83 Issue 5, p928 

    Palladium-containing carboxylated carbon nanofibers were studied as catalysts for hydrogenation of double bond >C=C< in olefins, unsaturated alcohols, and acids, as well as for hydrogenation of nitroarenes. The developed catalyst is 7 times more efficient than the industrial analog (Pd/C).

  • CCSD(T) intermolecular potential between He atom and ClF molecule: Comparison with experiment. Prosmiti, Rita; Cunha, Carlos; Villarreal, Pablo; Delgado-Barrio, Gerardo // Journal of Chemical Physics;8/22/2003, Vol. 119 Issue 8, p4216 

    The potential energy surface of the He–ClF complex is calculated using for He atom an efficient basis set of aug-cc-pV5Z augmented with a set of 3s3p2d2 f1g set of midbond functions and aug-cc-pVTZ, aug-cc-pVQZ for Cl and F atoms, respectively, at coupled-cluster with single and double...

  • Gyroresonance in unsaturated composite bodies: Experiments and theory. Mattei, Jean-Luc; Bariou, David; Chevalier, Alexis; Le Floc’h, Marcel // Journal of Applied Physics;5/1/2000, Vol. 87 Issue 9, p4975 

    The permeability spectra of composite magnetic materials (NiZn ferrite composites and YIG composites) has been experimentally studied on a wide range in magnetic load C. The resonance frequency decreases with the increasing magnetic load of the mixture. This is attributed to the fading of the...


Read the Article


Sorry, but this item is not currently available from your library.

Try another library?
Sign out of this library

Other Topics